What is the percentage of unaccounted water considered excessive?

A percentage of unaccounted water at 10% is generally considered excessive in the context of water distribution systems. This level indicates that a significant portion of the water that is produced or treated is not being accounted for in the billing or consumption records. Unaccounted water can stem from various issues such as leaks, metering inaccuracies, or unauthorized usage, and managing this percentage is critical for maintaining the efficiency and sustainability of a water supply system. Utility managers aim to keep unaccounted water as low as possible to ensure resources are not wasted, and financial losses are minimized. A higher threshold, such as 15% or 20%, compels immediate attention to investigate and rectify potential issues within the system. Thus, aiming for under 10% unaccounted water is essential for optimal water resource management.